A remotely controlled electronic reflector

Abstract

The present application relates to a remotely controllable electronic reflector. The reflector includes: an antenna array, an isolation design, a plurality of controllable phase-shifting amplifying modules and a remote control system; the antenna array includes a receiving array and a transmitting array; the corresponding array elements of the receiving array and the transmitting array constitute a group of transceiver array element pairs, and the isolation design is located between the receiving array and the transmitting array of the antenna array; the controllable phase-shifting amplifying module includes an amplifier and a phase shifter for adjusting the gain and phase shift between each group of transceiver array element pairs; the remote control system includes a remote control signal transmitter and a remote control command receiver for realizing the remote control function; the remote control function includes controlling the switch state of the reflector, controlling the amplitude and phase modulation of the echo signal; the remote control signal transmitter is used to transmit the remote control command. The RCS variation characteristics of the modulated target that can be remotely controlled by the electronic reflector are shown in FIG.

Description

Technical Field

[0001] The present application relates to the field of radar jamming technology, and in particular to a remotely controllable electronic reflector. Background Art

[0002] The main function of the reflector is to focus the radar wave signal and reflect it back along the original path of the incident direction, which can enhance the energy of the backscattered echo signal and achieve the effect of regulating the characteristics of the radar target. Commonly used reflectors include corner reflectors, Luneburg lenses, directional traceback antenna arrays, etc., but the RCS characteristics of these reflectors only change with the structure and size of the reflector. Once the reflector is processed and finalized, its RCS characteristics are fixed and can be easily distinguished by the radar identification system. The emergence of modulated electronic reflectors solves this problem. It can not only simulate the RCS change characteristics of real targets, act as a false target or radar bait to protect real targets; it also has a phase modulation function, which is not easily distinguished by the radar identification system.

[0003] However, although the current reflectors can modulate the signal amplitude and phase of radar target echoes to varying degrees and protect the real targets, they do not have the ability to remotely control the working status of the reflectors and cannot be well used in work scenarios such as harsh environments and complex terrains where people cannot get close to them. Summary of the invention

[0004] Based on this, it is necessary to provide a modulatable electronic reflector that can be remotely controlled to solve the above technical problems.

[0005] A remotely controllable electronic reflector, the reflector comprising an antenna array, an isolation design, a controllable phase-shifting amplification module and a remote control system;

[0006] The antenna array includes a receiving array and a transmitting array; the corresponding array elements of the receiving array and the transmitting array constitute a group of transmitting and receiving array element pairs, and all the transmitting and receiving array element pairs satisfy a phase conjugate relationship;

[0007] The isolation design is located between the receiving array and the transmitting array of the antenna array;

[0008] The controllable phase-shift amplification module includes an amplifier and a phase shifter, which are used to adjust the gain and phase shift between each group of transceiver array element pairs;

[0009] The remote control system includes a remote control signal transmitter and a remote control command receiver, which are used to realize the remote control function; the remote control function includes controlling the switch state of the reflector, controlling the amplitude and phase modulation of the echo signal; the remote control command receiver is located inside the reflector; and the remote control signal transmitter is used to transmit the remote control command.

[0010] In one embodiment, the total length of the transmission lines between all the transceiver array element pairs remains consistent.

[0011] In one embodiment, the isolation degree of the isolation design is greater than the maximum gain value of the amplifier.

[0012] In one embodiment, the number of controllable phase-shift amplification modules, the number of array elements of the receiving array of the antenna array, and the number of array elements of the transmitting array of the antenna array are the same; the antenna array is preferably a Van Atta antenna array.

[0013] In one embodiment, the remote control system can generate either an analog signal or a digital signal as the control signal.

[0014] In one embodiment, the remote control system may adopt remote control methods including but not limited to radio remote control, infrared remote control, laser remote control, microwave remote control, etc.

[0015] In one of the embodiments, the phase shifter of the controllable phase-shift amplification module and the amplifier are both controlled by the same control signal generated by the remote control command receiver.

[0016] In one embodiment, controlling the amplitude and phase modulation of the echo signal includes controlling the modulation frequency, timing and duty cycle of the signal.

[0017] The above-mentioned remotely controllable electronic reflector, the present invention adds a controllable phase-shifting amplification module so that the phase of the echo can be programmed and configured, adjusts the gain and phase shift between each group of transceiver array element pairs, and realizes the modulation function of the signal amplitude and phase of the radar target echo. At the same time, by adding a remote control system, remote control of the reflector switch state and the echo signal amplitude, phase modulation, etc. is realized. In the application of radar target characteristic control, the electronic reflector of the present invention can be remotely controlled to realize the amplitude and phase modulation of the echo signal, simulate the RCS change characteristics of the real target, and change the phase characteristics of the echo signal; the modulatable electronic reflector can also be arranged in working scenes such as harsh environments and complex terrains where people cannot operate at close range, and only needs to remotely control the change of its working state; in addition, the remote control of the reflector working state is realized by a remote control signal transmitter, so that the control process is simpler. The present invention has the advantages of miniaturization, modulatability, wide application environment and simple control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a remotely controllable electronic reflector in one embodiment;

[0019] Figure 2 The figure is a schematic diagram of a flow chart for realizing remote control of a remotely controllable electronic reflector in one embodiment. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] In one embodiment, Figure 1 As shown, a remotely controllable electronic reflector is provided, the reflector comprising an antenna array 1, a controllable phase-shifting amplification module 3, an isolation design 4 and a remote control system;

[0022] The antenna array 1 includes a receiving array 11 and a transmitting array 12; the corresponding array elements of the receiving array and the transmitting array constitute a group of transmitting and receiving array element pairs, and all the transmitting and receiving array element pairs satisfy a phase conjugate relationship;

[0023] The isolation design is located between the receiving array and the transmitting array of the antenna array;

[0024] The controllable phase-shift amplification module 3 comprises an amplifier 31 and a phase shifter 32, which are used to adjust the gain and phase shift between each group of transmitting and receiving array element pairs;

[0025] The remote control system includes a remote control signal transmitter 7 and a remote control command receiver 6, which are used to realize the remote control function; the remote control function includes controlling the switch state of the reflector, controlling the amplitude and phase modulation of the echo signal; the remote control command receiver 6 is located inside the reflector; the remote control signal transmitter 7 is used to transmit the remote control command.

[0026] In the specific implementation process, the antenna array 1 is connected to the controllable phase-shift amplifier module 3 through the transmission line 21, the transmission line 22, the transmission line 23 and the transmission line 24. The transmission lines 21 and 22 connect the antenna array elements on the receiving antenna array 11 to the input end of the controllable phase-shift amplifier module 3, and the transmission lines 23 and 24 connect the antenna array elements on the transmitting antenna array 12 to the output end of the controllable phase-shift amplifier module 3. The total length of the transmission lines connecting each group of receiving antenna array elements and transmitting antenna array elements (i.e., the sum of the lengths of the transmission lines 21 and 22 and the sum of the lengths of the transmission lines 23 and 24) is the same, and the receiving antenna array 11 and the transmitting antenna array 12 are the same 4×4 planar antenna arrays. In other embodiments, different antenna array elements, different numbers of array elements, and different array arrangements can be used according to actual needs. Generally, the greater the gain of the antenna array required, the greater the number of antenna array elements. The bandwidth and beam width of the antenna array element determine the bandwidth and spatial coverage of the retroreflector, and the bandwidth and beam width of the antenna array element can be selected according to actual needs.

[0027] The antenna array elements on the receiving antenna array 11 are connected to the input end of the controllable phase-shift amplifier module 3 through the transmission line 21, and the antenna array elements on the transmitting antenna array 12 are connected to the output end of the controllable phase-shift amplifier module 3 through the transmission line 23. The total length of the transmission line between each group of receiving antenna array elements and the transmitting antenna array elements (i.e., the sum of the lengths of the transmission line 21 and the transmission line 23) is kept consistent to achieve phase conjugation. A controllable phase-shift amplifier module 3 is loaded between each group of array elements, for a total of 16; each controllable phase-shift amplifier module 3 includes an amplifier 31 and a phase shifter 32, which are used to adjust the gain and phase shift between each group of transmitting and receiving array element pairs, thereby achieving the modulation function of the signal amplitude and phase of the radar target echo.

[0028] The control signal output by the remote control command receiver 6 can respectively control the amplifier, phase shifter and reflector power switch 5 in the controllable phase-shift amplification module 3 to switch quickly; the amplifiers of all controllable phase-shift amplification modules 3 are controlled by the same control signal generated by the remote control command receiver 6 to ensure that the gains of each group of array elements of the receiving antenna array 11 and the transmitting antenna array 12 are the same; the phase shifters of all controllable phase-shift amplification modules 3 are controlled by the same control signal generated by the remote control command receiver 6 to ensure that the receiving antenna array 11 and the transmitting antenna array 12 are always in a phase conjugate state, so that the direction of the reflected beam is consistent with the direction of the incident beam of the radar wave.

[0029] Taking the above embodiment as an example, the remote control function mentioned in the present invention is specifically described below. The remote control system added to the reflector is composed of a remote control signal transmitter 7 and a remote control command receiver 6; the remote control command receiver 6 outputs a corresponding control signal by receiving the remote control command transmitted by the remote control signal transmitter; the control signal can control the amplifier, phase shifter and power switch in the controllable phase-shift amplifier module respectively. Different buttons on the remote control signal transmitter 7 correspond to different remote control functions, including control of the switch state of the reflector, control of the amplitude and phase modulation of the echo signal, etc.

[0030] To explain more clearly, Figure 2 The work flow of the reflector of the present invention that can realize the remote control function is shown. Different buttons on the remote control signal transmitter 7 control the transmission of different remote control commands, and the remote control command receiver 6 outputs corresponding control signals by receiving the remote control commands transmitted by the remote control signal transmitter 7. The remote control signal transmitter 7 controls the frequency, timing, duty cycle and other characteristics of the control signal output by the receiving circuit by transmitting different remote control commands; the receiver changes the frequency, timing or duty cycle of the control signal output according to the different remote control commands received, and the control signal further controls the reflector switch state, echo signal amplitude and phase modulation and other multiple functions.

[0031] In one embodiment, the total length of the transmission lines between all the transceiver array element pairs remains consistent.

[0032] In a specific embodiment, the total length of the transmission lines between each group of array elements remains consistent, satisfying the phase conjugation relationship between all pairs of transmitting and receiving array elements.

[0033] In one embodiment, the isolation degree of the isolation design is greater than the maximum gain value of the amplifier.

[0034] In a specific embodiment, the isolation degree of the isolation design is greater than the maximum gain value of the amplifier, which can prevent the loop from self-excitation.

[0035] In one embodiment, the number of controllable phase-shift amplification modules, the number of array elements of the receiving array of the antenna array, and the number of array elements of the transmitting array of the antenna array are the same; the antenna array is preferably a Van Atta antenna array.

[0036] In one embodiment, the remote control system can generate either an analog signal or a digital signal as the control signal.

[0037] In one embodiment, the remote control system may adopt remote control methods including but not limited to radio remote control, infrared remote control, laser remote control, microwave remote control, etc.

[0038] In one of the embodiments, the phase shifter of the controllable phase-shift amplification module and the amplifier are both controlled by the same control signal generated by the remote control command receiver.

[0039] In a specific embodiment, the phase shifters of all controllable phase-shift amplification modules are controlled by the same control signal generated by the remote control command receiver to ensure that the phase delays of each group of array elements between the receiving antenna array and the transmitting antenna array are consistent, and the transmitting and receiving antenna arrays are always in a phase conjugate state. If in a process, the phase of the output wave is the complex conjugate of the phase of the input wave, then this process is defined as phase conjugation;

[0040] The amplifiers of all controllable phase-shift amplifier modules are controlled by the same control signal generated by the remote control command receiver to ensure that each group of array elements between the receiving antenna array and the transmitting antenna array obtains the same gain.

[0041] In one embodiment, controlling the amplitude and phase modulation of the echo signal includes controlling the modulation frequency, timing and duty cycle of the signal.

[0042] It should be understood that although Figure 2The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 2 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0043] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A remotely controllable electronic reflector, characterized in that: The reflector includes: an antenna array, an isolation design, a controllable phase-shifting amplification module and a remote control system; The antenna array includes a receiving array and a transmitting array; the corresponding array elements of the receiving array and the transmitting array constitute a group of transmitting and receiving array element pairs, and all the transmitting and receiving array element pairs satisfy a phase conjugate relationship; The isolation design is located between the receiving array and the transmitting array of the antenna array; The controllable phase-shift amplification module includes an amplifier and a phase shifter, which are used to adjust the gain and phase shift between each group of transceiver array element pairs; The remote control system includes a remote control signal transmitter and a remote control command receiver, which are used to realize the remote control function; the remote control signal transmitter is used to transmit the remote control command to the remote control command receiver; the remote control command receiver is used to output the corresponding control signal according to the remote control command to control the amplifier, the phase shifter and the reflector power switch of the controllable phase-shift amplifier module respectively to realize the remote control function; the remote control function includes controlling the reflector switch state, controlling the echo signal amplitude and phase modulation; the remote control command receiver is located inside the reflector; the remote control signal transmitter is located outside the reflector; the remote control signal transmitter is used to transmit the remote control command; The remote control system adopts radio remote control, infrared remote control, laser remote control or microwave remote control; The amplifiers of all controllable phase-shift amplifier modules are controlled by the same control signal generated by the remote control command receiver to ensure that the gain between each group of array elements of the receiving antenna array and the transmitting antenna array is the same; the phase shifters of all controllable phase-shift amplifier modules are controlled by the same control signal generated by the remote control command receiver to ensure that the receiving antenna array and the transmitting antenna array are always in a phase conjugate state, so that the direction of the reflected beam is consistent with the direction of the incident beam of the radar wave; The control of the amplitude and phase modulation of the echo signal includes controlling the modulation frequency, timing and duty cycle of the signal.

2. The electron reflector according to claim 1, characterized in that: The total length of the transmission lines between all the transceiver array element pairs is kept consistent.

3. The electron reflector according to claim 1, characterized in that: The isolation degree of the isolation design is greater than the maximum gain value of the amplifier.

4. The electron reflector according to any one of claims 1 to 3, characterized in that: The number of controllable phase-shift amplification modules, the number of array elements of the receiving array of the antenna array and the number of array elements of the transmitting array of the antenna array are the same; the antenna array is a VanAtta antenna array.

5. The electron reflector according to claim 3, characterized in that: The remote control system may generate either an analog signal or a digital signal as the control signal.

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